Rotor for motors.



W. G. VIALL.

ROTOR FOR MOTORS. APPLICATION FILED MAR. 9, 1912.

1,126,594. Patented Jan. 26, 1915.

@Hoving/.

UNITED sTA'ilEs PATENT oEEIoE.

WILLIAM G. VIALL, 0F BRIDGEPORT, CONNECTICUT.

ROTOR FOR MOTORS.

duction type and particularly to the operative member or rotors t'or alternating current motors.

The purpose ot' my invention is to produce an improved, simple and inexpensive form of rotor which can be easily stamped up from sheet metal and quickly assembled in a way to insure cheapness in construction, to turther,design the rotor in such a manner as to improve its general eflieiency and durability, to lessen the number of parts and to finally produce a rotor which is well adapted to operate electric fans, and which 'is particularly suitedto a simple and iinproved form of winding.

Vith these and other objects in View the invention resides and consists in the construction and novel combination and arrangement of parts hereinafter more fully described. illustrated in the accompanying drawings, and pointed out in the claims hereto appended, it being understood that various changes in the form, proportion, size and minor details of construction within the scope of the claims may be resorted t o without departure from the spirit orsacrificing any of the advantages of the invention.

Similar characters ot' reference denote like or corresponding parts throughout the several figures ot' the accompanying drawings forming a part of this specification, and upon which,

Figure l, shows a perspective View of the assembled and specially formed plates constituting the core of my improved motor. Fig. 2, is a similar perspective view, of the rotor completed ready for placement in a motor frame. Fig. 3. is a detached plan view of the slotted copper binding plate shown attached to the rotor in Fig. 2. Fig. l, is an edge view of the plate shown in Fig. 3. Fig. shows a Ifurther plan and end view ot' a slightlv modified form of copper binding plate. Fig. t3. a side View of the. binding plate shown in Fig. Fig.

i', shows a detail cross sectional view across Specification of Letters Patent.

Patented Jan. 26, 1915.

Application filed March 9, 1912. Serial No. 682,675.

a part of the rotor showing the L-sliaped slots with bridge pieces therein. Fig. 8, is an edge view, showing the means for connecting the adjoining ends of the binding plate, shown in Fig. Fig. 9, is a. cent-ral vertical longitudinal section through the rotor shown in Fig. Fig. l0, is a detached perspective view of the binding plate rolled up and ready for attachment to the assembled core plates shown in Fig. 1, and Fig.

1l, is a perspective view of rotor the projecting edges of slots and bridges in binding shown as arranged spirally, straight as in the other views.

Referring in detail to the characters of reference marked upon the drawings, 12 represents a metal spindle upon which the other assembled parts of the rotor are mounted. The core of the rotor is made up of a series of metal disks 13 alike in construction and stamped from sheet iron, and are secured together by a tube and a single copper plate, without the use of solder. T hese stampings 13 are substantially round in form and are provided with a central hole 14 and a series of under cut notches 15 in their peripheral edge, thus forming a corresponding number of extended teeth 16. Said disks are lined up on the tubular bushing 17 as shown in Fig. 9, the ends of the bushing being turned out against the outer or end disks in a way to hold the disks together. The bushing in turn is formed or otherwise secured to the before. mentioned spindle 12, in the manner shown in Fig. i). The disks are carefully assembled so that the notches and teeth thereof properly register one with the other to form a 'series of longitudinal grooves and i'ibs in the face of the core, formed of the assembled disks, at correslionding intervals. These assembled soft iron disks constitute the core, which are first secured together by means of the tube before mentioned and are further held by means ot' a special form of copper plate 1S, that is wound around, and fitted in the grooves-ot the core. ina way to form a series of longitudinal copper members intermediate otl thc projected iron ribs and which are thus disposed parallel with the. spindle. This binding plate will perhaps be best understood from Figs. :'2 and l0. and includes cross slots 19 bridge portions 20 and side flanges 2l which latter is extended out slightly over the ends ot the core, and its an assembled the core and plate being `instead of edges may be i'olledsover uponfitself to formi.

an'annular rib '22 -upon eacliend to stiften and strengthen the structui'e. rolled from the liat shape shown iiiFigs. 3 and l to the cylindrical forni seen in Fig. whereupon it is placed around the'core and its ends tightly secured together to insure a firm fastening of the pla-te to the core.

The preferred means'of securing the ends of the plate together is shownY in Figs. 3, 4; and 10 andconsists informing extended vtongues 23 on .one end of the plate and suitable eyes 24j in the other` end, andthen simply threading the said .tongues through lthe eyes and bending the-in back under the plate. lf desired, however, suitable eyes 25 Vmay be formed in both ends of the plate in a corresponding position so that when the platel is rolled said eyes Will aline With each other to receive the uniting staples 26, as..

shown in` Figs. 2 and 8. The notches in the peripheral edges of disks Which form the dercut,` or of an,

grooves in the core, as before stated are un- `L shape, better to receive and retain the cylindrical plate member in A position. This form of groove provides a comparatively wide bottom to -the groove such as will accommodate the flat form of bridge 20 andsupport the same in. place against its centrifugal tendency to fly off from the core when the rotor is in motion.

The construction further :insures -the said.

bridgeportion remaining below the surface of the, ribs and thus ivithin the grooves in 4the periphery of kthe rotor. .The one edge of these bridgeI portions. is extended out-` Wardly as shown in Figs. 3, l andS if desired to form outstanding anges 27 and thereby to better conform to the shape of the groove and add metalland strength to the device.

If desired to form a motor .with spirally disposed` iron ribs, as Vshovvn -in Fig. 11, it

, would be done by arranging the notches ofv the respective plates, When assemblingthe saine, so as to form the ribs and grooves spirally, and also forming the cross slots in the plate diagonally, so that When the plate is rolled to a cylindrical form thesaid slots would conform to the spirally yformed ribs and the bridge portions properly fit into the The plate is t periphery,

spirallyv4 formed Aslots in the core as will readily be understood from Fig. 11.

Having thus described my invention what I claim and desire to secure by Letters Patent is I. A. rotor for alternating current motors, comprising a series of metal disks secured together and forming a core having a series of longitudinal vL shaped grooves and ribs in its peripheral surface, a single copper plate Wound upon the core and provided with a series of slots to'receive the ribs, av

series of bridge portions to enter the grooves and provided with means to engage the shoulders of theribs, and means for securingthe lplate upon the core. 2. A rotor for-alternating current motors, comprising a core having a series of longitudinal L-shaped grooves in its rperiphery whereby .to form intermediate ribs in the surface of the core, a single flexible copper plate encircling the core and provided with aV series of cross slots and intermediate bridge portions, the slots receiving the ribs,

and the bridge portionsfitting Within the grooves, means arranged at the edge portions of the slots and fitting under the shoulders of the ribs, and means for connecting the ends of said plate.

3. A rotor for alternating current motors,

l comprising a core having a series of longitudinally extending L-shaped grooves in its whereby to form a plurality of longitudinal ribs the inner portions of which are undercut, a single copper plate` encircling the core and provided with a Y series of cross slots and intermediate bridge portions, said slotsreceiving said ribs, and said bridge portions fitting Within said grooves and into the undercut, outstanding flanges arranged in the grooves and between the rib portions, and means for connecting the ends of the copper plate together.

Signed at Bridgeport in the county of Fairfield and State of Connecticut this 24th day of February A. D.,-1912.

WILLIAM G. VIA LL.

Witnesses: l C. M. NEWMAN, Gao. R. BRUNER. 

